Ok guys... I need some sort of bluetooth or wifi transmitter that I can use as a tracking device. I want to have this girl dancing, a bailarina, and I want to have the trace of her feet draw on the floor. I have the guy who can do the projector and video mapping and all that. But he usually uses infrared or camera tracking. I was wondering if I could get a device on her ancles to track her movements, just of the ancles. And use that data to draw in real time with the projector. I need to know if there is such device, I do not know if an Apple Watch with gyroscope or some sort of gyroscope that can transmit the data to a computer. Once the data transmitted we can take care of the rest. Thank you very much.